It's not only the crank work.
Case compression has been raised to shift best pumping efficiency to high regions
Flow channels have been changed to obtain the same
The front bearing is fixed, so the rear bearing can float to allow heat expansion
The piston is adapted to allow good flow at high rpm.

This all works well in glow engines that rev up to 40,000. Diesels are a bit different in that they do not rev up all that high. I do however like the case stuffing and the front bearing fixing. For porting I would probably stick with 360° porting for least scavenge loss.